One thing that has always frustrated me about utilizing Carbonite is its lack of clarity when trying to figure out how to do some of the most basic things.

I don't know how it happened, but my square Carbonite minimap is gone. I've spent a half-hour trying various combinations of settings to get the square one back, but the best I can do is use the round WoW-based map with the Carbonite versions of the buttons in a moveable column (which is how I want them).

How do I get the square Carbonite map to replace the round WoW map (and yes, I have the 'Minimap is square' option checked)?

First:
Carbonite has one map and it is either maximized (large, like Blizzards World Map) or minimized (minimap sized but NOT the minimap). Blizzard gives us three maps: The Minimap (found in the upper right corner of your screen), the World Map (the big map) and the Zone (sometimes referred to as the Battleground) Map. A technicality, to be sure, but it occasionally helps to use the correct terms when explaining something.

Open Carbonites options to the "Map" page and make sure the "Hide maximized map when ESC or map toggle (M) key is pressed" is NOT checked. Also, just a reminder, pressing the "M" key would normally switch between the minimized and maximized Carbonite map.

If that option was not checked, then it is possible that you have accidentally dragged the Carbonite minimized map off the screen. Type /carb resetwin in chat. That will reset the positions of all of Carbonites window's back to default for that character only. Alternatively, you can open Carbonites options to the "Reset" page, and choose the "Reset window layouts of current character" option.

You can find out more about how Carbonite works, and how it can be set up, by reading the "CarboniteReadMe" plain text file in your "Path to your WoW folder\Interface\AddOns\Carbonite\" folder. There is a lot of installation information at the top of the file, but, since it's already installed, you can safely skip that.

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Ahhhh, the vagueries of the aging mind. Wait.... What was I saying?